iio:st_pressure:initial lps22hh sensor support

Initial support for ST LPS22HH pressure sensor. Datasheet:
http://www2.st.com/resource/en/datasheet/lps22hh.pdf

Features:
 * pressure, temperature data and timestamping channels
 * sampling frequency selection [1..200] Hz
 * interrupt based trigger
 * over I2C or SPI interface

Signed-off-by: mario tesi <mario.tesi@st.com>
Acked-by: Denis Ciocca <denis.ciocca@st.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/drivers/iio/pressure/Kconfig b/drivers/iio/pressure/Kconfig
index eaa7cfc..efeb89f 100644 (file)
--- a/drivers/iio/pressure/Kconfig
+++ b/drivers/iio/pressure/Kconfig
@@ -165,7 +165,7 @@ config IIO_ST_PRESS
        select IIO_TRIGGERED_BUFFER if (IIO_BUFFER)
        help
          Say yes here to build support for STMicroelectronics pressure
-         sensors: LPS001WP, LPS25H, LPS331AP, LPS22HB.
+         sensors: LPS001WP, LPS25H, LPS331AP, LPS22HB, LPS22HH.
 
          This driver can also be built as a module. If so, these modules
          will be created:

diff --git a/drivers/iio/pressure/st_pressure.h b/drivers/iio/pressure/st_pressure.h
index e67eb0d..5794660 100644 (file)
--- a/drivers/iio/pressure/st_pressure.h
+++ b/drivers/iio/pressure/st_pressure.h
@@ -21,6 +21,7 @@ enum st_press_type {
        LPS22HB,
        LPS33HW,
        LPS35HW,
+       LPS22HH,
        ST_PRESS_MAX,
 };
 
@@ -30,6 +31,7 @@ enum st_press_type {
 #define LPS22HB_PRESS_DEV_NAME         "lps22hb"
 #define LPS33HW_PRESS_DEV_NAME         "lps33hw"
 #define LPS35HW_PRESS_DEV_NAME         "lps35hw"
+#define LPS22HH_PRESS_DEV_NAME         "lps22hh"
 
 /**
  * struct st_sensors_platform_data - default press platform data

diff --git a/drivers/iio/pressure/st_pressure_core.c b/drivers/iio/pressure/st_pressure_core.c
index 4ddb6cf..38dcdb7 100644 (file)
--- a/drivers/iio/pressure/st_pressure_core.c
+++ b/drivers/iio/pressure/st_pressure_core.c
@@ -492,6 +492,75 @@ static const struct st_sensor_settings st_press_sensors_settings[] = {
                .multi_read_bit = false,
                .bootime = 2,
        },
+       {
+               /*
+                * CUSTOM VALUES FOR LPS22HH SENSOR
+                * See LPS22HH datasheet:
+                * http://www2.st.com/resource/en/datasheet/lps22hh.pdf
+                */
+               .wai = 0xb3,
+               .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
+               .sensors_supported = {
+                       [0] = LPS22HH_PRESS_DEV_NAME,
+               },
+               .ch = (struct iio_chan_spec *)st_press_lps22hb_channels,
+               .num_ch = ARRAY_SIZE(st_press_lps22hb_channels),
+               .odr = {
+                       .addr = 0x10,
+                       .mask = 0x70,
+                       .odr_avl = {
+                               { .hz = 1, .value = 0x01 },
+                               { .hz = 10, .value = 0x02 },
+                               { .hz = 25, .value = 0x03 },
+                               { .hz = 50, .value = 0x04 },
+                               { .hz = 75, .value = 0x05 },
+                               { .hz = 100, .value = 0x06 },
+                               { .hz = 200, .value = 0x07 },
+                       },
+               },
+               .pw = {
+                       .addr = 0x10,
+                       .mask = 0x70,
+                       .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
+               },
+               .fs = {
+                       .fs_avl = {
+                               /*
+                                * Pressure and temperature sensitivity values
+                                * as defined in table 3 of LPS22HH datasheet.
+                                */
+                               [0] = {
+                                       .num = ST_PRESS_FS_AVL_1260MB,
+                                       .gain = ST_PRESS_KPASCAL_NANO_SCALE,
+                                       .gain2 = ST_PRESS_LPS22HB_LSB_PER_CELSIUS,
+                               },
+                       },
+               },
+               .bdu = {
+                       .addr = 0x10,
+                       .mask = BIT(1),
+               },
+               .drdy_irq = {
+                       .int1 = {
+                               .addr = 0x12,
+                               .mask = BIT(2),
+                               .addr_od = 0x11,
+                               .mask_od = BIT(5),
+                       },
+                       .addr_ihl = 0x11,
+                       .mask_ihl = BIT(6),
+                       .stat_drdy = {
+                               .addr = ST_SENSORS_DEFAULT_STAT_ADDR,
+                               .mask = 0x03,
+                       },
+               },
+               .sim = {
+                       .addr = 0x10,
+                       .value = BIT(0),
+               },
+               .multi_read_bit = false,
+               .bootime = 2,
+       },
 };
 
 static int st_press_write_raw(struct iio_dev *indio_dev,

diff --git a/drivers/iio/pressure/st_pressure_i2c.c b/drivers/iio/pressure/st_pressure_i2c.c
index 2026a10..a60849d 100644 (file)
--- a/drivers/iio/pressure/st_pressure_i2c.c
+++ b/drivers/iio/pressure/st_pressure_i2c.c
@@ -45,6 +45,10 @@ static const struct of_device_id st_press_of_match[] = {
                .compatible = "st,lps35hw",
                .data = LPS35HW_PRESS_DEV_NAME,
        },
+       {
+               .compatible = "st,lps22hh",
+               .data = LPS22HH_PRESS_DEV_NAME,
+       },
        {},
 };
 MODULE_DEVICE_TABLE(of, st_press_of_match);
@@ -69,6 +73,7 @@ static const struct i2c_device_id st_press_id_table[] = {
        { LPS22HB_PRESS_DEV_NAME, LPS22HB },
        { LPS33HW_PRESS_DEV_NAME, LPS33HW },
        { LPS35HW_PRESS_DEV_NAME, LPS35HW },
+       { LPS22HH_PRESS_DEV_NAME, LPS22HH },
        {},
 };
 MODULE_DEVICE_TABLE(i2c, st_press_id_table);

diff --git a/drivers/iio/pressure/st_pressure_spi.c b/drivers/iio/pressure/st_pressure_spi.c
index 9a3441b..79a12ed 100644 (file)
--- a/drivers/iio/pressure/st_pressure_spi.c
+++ b/drivers/iio/pressure/st_pressure_spi.c
@@ -49,6 +49,10 @@ static const struct of_device_id st_press_of_match[] = {
                .compatible = "st,lps35hw",
                .data = LPS35HW_PRESS_DEV_NAME,
        },
+       {
+               .compatible = "st,lps22hh",
+               .data = LPS22HH_PRESS_DEV_NAME,
+       },
        {},
 };
 MODULE_DEVICE_TABLE(of, st_press_of_match);
@@ -93,6 +97,7 @@ static const struct spi_device_id st_press_id_table[] = {
        { LPS22HB_PRESS_DEV_NAME },
        { LPS33HW_PRESS_DEV_NAME },
        { LPS35HW_PRESS_DEV_NAME },
+       { LPS22HH_PRESS_DEV_NAME },
        {},
 };
 MODULE_DEVICE_TABLE(spi, st_press_id_table);